Honegger, R 1980: The ascus apex in lichenized fungi II. The Rhizocarpon-type. - Lichenologist12: 157-172. [RLL List # 108-43 / Rec.# 8703] Keywords: TEM/ ASCUS/ MORPHOLOGY/ RHIZOCARPON/ LECANORALES/ OWN/ BITUNICATE
Abstract: 8 figures. [The Rhizocarpon ascus differs from all other types in the Lecanorales. "It is bitunicate, opening with a slight 'Jack-in-the-box' mechanism." The Rhizocarpon-type ascus is considered to be the most archaic type in the Lecanorales.]